NXP Semiconductors FS32K146UIT0VLLT

Overview

FS32K146UIT0VLLT from NXP Semiconductors is an automotive-grade 32-bit Arm® Cortex-M4F microcontroller designed for real-time safety-critical applications. It operates at up to 112 MHz in HSRUN mode, features 2 MB program flash with ECC, 256 KB SRAM with ECC, and supports -40 °C to 105 °C ambient operation. It integrates FlexCAN with optional CAN-FD, multiple low-power communication interfaces (LPUART/LPSPI/LPI2C), and CSEc cryptographic security engine - deployed in vehicle body control modules requiring ASIL-B compliance.

For engineers reviewing the FS32K146UIT0VLLT datasheet, FS32K146UIT0VLLT pinout, FS32K146UIT0VLLT application, or FS32K146UIT0VLLT equivalent, key selection considerations include its 100-pin LQFP package, dual 12-bit ADCs (32-channel total), 8x FlexTimer modules (64 PWM/IC/OC channels), HSRUN/RUN/STOP power modes, and mandatory mode-switching (to 80 MHz RUN) for CSEc or EEPROM operations.

Technical Context

The FS32K146UIT0VLLT implements a dual-core architecture with Arm Cortex-M4F as primary execution core and M0+ for low-power background tasks, sharing AXBS-Lite crossbar switch and eDMA controller. Its clock system includes SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), with configurable clock gating per peripheral domain.

Memory subsystem comprises ECC-protected 2 MB flash, 64 KB FlexNVM (with EEPROM emulation), 256 KB SRAM, and 4 KB FlexRAM usable as SRAM or EEPROM backup. Safety mechanisms include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and hardware-accelerated CSEc compliant with SHE specification.

Key Specifications

Pinout & Package

FS32K146UIT0VLLT is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow NXP's standardized S32K14x I/O multiplexing scheme, supporting flexible peripheral routing via TRGMUX and IO PORT controllers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Compared with FS32K146UIT0VLLT, S32K148UJT0VLLT adds Ethernet and audio interfaces at higher cost and power, while S32K144UJT0VLLT reduces memory and removes QuadSPI to lower price - both retain identical pinout, safety features, and CAN-FD capability, enabling scalable platform design.

Availability

FS32K146UIT0VLLT is available at Aetrix Electronics and suitable for automotive body control, electric power steering, ADAS sensor hubs, and vehicle gateway applications requiring stable component supply across extended product lifecycles.

Supply support for FS32K146UIT0VLLT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in functional safety and automotive qualification standards.

The S32K1xx family - including FS32K146UIT0VLLT - was engineered specifically for ASIL-B automotive applications, emphasizing real-time determinism, hardware-based security, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating frequency of the FS32K146UIT0VLLT and under what conditions?

The FS32K146UIT0VLLT achieves up to 112 MHz in HSRUN mode, supported by its System PLL (SPLL) and requiring VDD ≥ 2.7 V. This frequency is validated for ambient temperatures from –40 °C to 105 °C. Operation above 80 MHz mandates use of the FIRC or SOSC clock sources with appropriate PLL configuration; the device automatically downclocks to 80 MHz RUN mode during CSEc or EEPROM operations to maintain reliability.

Does the FS32K146UIT0VLLT support CAN-FD, and how many instances are available?

Yes, the FS32K146UIT0VLLT integrates three independent FlexCAN modules, each capable of CAN-FD operation per ISO 11898-1. All three support data rates up to 5 Mbps in FD mode and are fully configurable for classic CAN or CAN-FD frames, with built-in message RAM, acceptance filtering, and loopback self-test capabilities - confirmed in the S32K1xx Data Sheet Rev. 15 feature comparison table.

What safety certifications and hardware safety features does the FS32K146UIT0VLLT include?

The FS32K146UIT0VLLT is designed to support ASIL-B compliance per ISO 26262. It includes hardware safety features such as ECC on flash and SRAM, System MPU for crossbar-level memory protection, CRC module, dual watchdogs (WDOG and EWM), lockstep-capable peripherals, and voltage/temperature monitoring circuits. These are documented in the S32K1xx Data Sheet sections on Safety and Security and verified in NXP's FMEDA reports.

Can the FS32K146UIT0VLLT execute CSEc cryptographic operations at 112 MHz?

No - the FS32K146UIT0VLLT requires switching from HSRUN mode (112 MHz) to RUN mode (80 MHz) before executing CSEc security functions or FlexNVM EEPROM emulation. Attempting these operations in HSRUN mode triggers error flags and halts execution, as explicitly stated in the S32K1xx Data Sheet Rev. 15 under Power Management and Safety & Security sections.

What package type and pin count does the FS32K146UIT0VLLT use, and is it pin-compatible with other S32K14x devices?

The FS32K146UIT0VLLT uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Per the S32K1xx Data Sheet Rev. 15, all S32K14x devices sharing the same package variant - including S32K144UJT0VLLT and S32K148UJT0VLLT - are pin-to-pin compatible, enabling hardware reuse across memory and peripheral variants without PCB redesign.